Hah, mine flickers around on my 650, I've not got round to looking at it yet. Normally flickers between 1st and 2nd when in 1st gear, but I saw 3rd whilst in 1st the other day too. Waiting for service day when the oil has drained to clean the contacts up a bit.
Under warranty I'd get it looked at by Suzuki, you may get a free oil change out of it!